The forms of words as they appear in text and speech are central to theories and models of lexical processing. Nonetheless, current methods for simulating their learning and representation fail to approach the scale and heterogeneity of real wordform lexicons. A connectionist architecture termed thesequence encoderis used to learn nearly 75,000 wordform representations through exposure to strings of stress‐marked phonemes or letters. First, the mechanisms and efficacy of the sequence encoder are demonstrated and shown to overcome problems with traditional slot‐based (...) codes. Then, two large‐scale simulations are reported that learned to represent lexicons of either phonological or orthographic wordforms. In doing so, the models learned the statistics of their lexicons as shown by better processing of well‐formed pseudowords as opposed to ill‐formed (scrambled) pseudowords, and by accounting for variance in well‐formedness ratings. It is discussed how the sequence encoder may be integrated into broader models of lexical processing. (shrink)

The forms of words as they appear in text and speech are central to theories and models of lexical processing. Nonetheless, current methods for simulating their learning and representation fail to approach the scale and heterogeneity of real wordform lexicons. A connectionist architecture termed thesequence encoderis used to learn nearly 75,000 wordform representations through exposure to strings of stress‐marked phonemes or letters. First, the mechanisms and efficacy of the sequence encoder are demonstrated and shown to overcome problems with traditional slot‐based (...) codes. Then, two large‐scale simulations are reported that learned to represent lexicons of either phonological or orthographic wordforms. In doing so, the models learned the statistics of their lexicons as shown by better processing of well‐formed pseudowords as opposed to ill‐formed (scrambled) pseudowords, and by accounting for variance in well‐formedness ratings. It is discussed how the sequence encoder may be integrated into broader models of lexical processing. (shrink)

Sibley, Kello, Plaut, and Elman (2008) proposed the sequence encoder as a model that learns fixed‐width distributed representations of variable‐length sequences. In doing so, the sequence encoder overcomes problems that have restricted models of word reading and recognition to processing only monosyllabic words. Bowers and Davis (2009) recently claimed that the sequence encoder does not actually overcome the relevant problems, and hence it is not a useful component of large‐scale word‐reading models. In this reply, it is noted that the (...) sequence encoder has facilitated the creation of large‐scale word‐reading models. The reasons for this success are explained and stand as counterarguments to claims made by Bowers and Davis. (shrink)

Book Information Aesthetic Concepts--Essays after Sibley. Edited by Emily Brady and Jerrold Levinson. Clarendon Press. Oxford. 2001. Pp. ix + 239. £35.

Sibley et al. (2008) report a recurrent neural network model designed to learn wordform representations suitable for written and spoken word identification. The authors claim that their sequence encoder network overcomes a key limitation associated with models that code letters by position (e.g., CAT might be coded as C‐in‐position‐1, A‐in‐position‐2, T‐in‐position‐3). The problem with coding letters by position (slot‐coding) is that it is difficult to generalize knowledge across positions; for example, the overlap between CAT and TOMCAT is lost. Although (...) we agree this is a critical problem with many slot‐coding schemes, we question whether the sequence encoder model addresses this limitation, and we highlight another deficiency of the model. We conclude that alternative theories are more promising. (shrink)

A complete collection of Frank Sibley's articles on philosophical aesthetics, this volume includes five, remarkable, hitherto unpublished papers written in Sibley's later years. It addresses many topics, among them the nature of aesthetic qualities versus non-aesthetic qualities, the relation of aesthetic description to aesthetic evaluation, the different levels of evaluation, and the objectivity of aesthetic judgement. The later papers constitute both a significant development of Sibley's individual approach to aesthetics, such as his discussion of the distinction between (...) attributive and predicative uses of adjectives and of the aesthetic significance of tastes and smells, a topic Sibley considered to be much neglected. (shrink)

Geographies of Exclusion identifies forms of social and spatial exclusion and subsequently examines the fate of knowledge of space and society which has been produced by members of excluded groups. Evaluating writing on urban society by women and black writers, David Sibley asks why such work is neglected by the academic establishment, suggesting that both the practices which result in the exclusion of minorities and those which result in the exclusion of knowledge have important implications for theory and method (...) in human geography. Drawing on a range of ideas from social anthropology, feminist theory, sociology, human geography and psychoanalysis, this book presents a fresh approach to geographical theory, highlighting the tendency of powerful groups to "purify" space and to view minorites as defiled and polluting, and exploring the nature of "difference" and the production of knowledge. (shrink)

BackgroundCurrent guidelines do not clearly outline when assent should be attained from paediatric research participants, nor do they detail the necessary elements of the assent process. This stems from the fact that the fundamental justification behind the concept of assent is misunderstood. In this paper, we critically assess three widespread ethical arguments used for assent: children’s rights, the best interests of the child, and respect for a child’s developing autonomy. We then outline a newly-developed two-fold justification for the assent process: (...) respect for the parent’s pedagogical role in teaching their child to become an autonomous being and respect for the child’s moral worth.DiscussionWe argue that the ethical grounding for the involvement of young children in medical decision-making does not stem from children’s rights, the principle of best interests, or respect for developing autonomy. An alternative strategy is to examine the original motivation to engage with the child. In paediatric settings there are two obligations on the researcher: an obligation to the parents who are responsible for determining when and under what circumstances the child develops his capacity for autonomy and reasoning, and an obligation to the child himself. There is an important distinction between respecting a decision and encouraging a decision. This paper illustrates that the process of assent is an important way in which respect for the child as an individual can be demonstrated, however, the value lies not in the child’s response but the fact that his views were solicited in the first place.SummaryThis paper demonstrates that the common justifications for the process of assent are incomplete. Assent should be understood as playing a pedagogical role for the child, helping to teach him how specific decisions are made and therefore helping him to become a better decision-maker. How the researcher engages with the child supports his obligation to the child’s parents, yet why the researcher engages with the child stems from the child’s moral worth. Treating a child as having moral worth need not mean doing what they say but it may mean listening, considering, engaging or involving them in the decision. (shrink)

The foundation of the Christian counselling movement -- Christian counselling in the UK -- The aims of Christian counselling -- Integrating psychological and biblical truth -- Sigmund Freud--the founding father of psychotherapy -- The individual psychology of Alfred Adler -- Abraham Maslow--the man with new age tendencies -- Carl Rogers--a man who believed in himself -- Albert Ellis--the aggressive atheist -- The Bible's verdict on psychological 'truth' -- The case against Larry Crabb -- Self-esteem: the secular foundation -- Self-esteem and (...) the Christian counselling movement -- Self-esteem dogma in the light of scripture. (shrink)

Part of the contents: 0Happiness and Theôria in Books I and X of the Nicomachean Ethics / Eudaimonia and Theôria within the 0Nicomachean Ethics / The Meaning of Bios in Aristotle’s Ethics and Politics / Approximation and Acting for an 0Ultimate End / Eudaimonia, Theôria, and the Choiceworthiness of Practical Wisdom / Aristotle on the Choice of Lives: Two Concepts of Self-Sufficiency / Eudaimonia and Contemplation in Aristotle’s Ethics / Theôria and Praxis in Aristotle’s Ethics / The Private Moral Life (...) of Aristotle’s Philosopher: A Defense of a Non-Intellectualist Interpretation of Nicomachean Ethics / Theoretical Life, Practical Life, and Happiness in Aristotle / The Best Life according to Aristotle : A Reconsideration / Theos, Theôria, and Therapeia in Aristotle’s Ethical Endings / Contemplation and Service of the God: The Standard for External Goods in Eudemian Ethics / 0Aristotelian Immortality.0. (shrink)

A recent article from Archives of Disease in Childhood outlined problems with the act of gaining child assent for research participation. However the arguments used in the article are incomplete or misguided. Rather than being harmful, assent should be seen as an ethically-appropriate way in which we can engage with the child about his participation in research. While additional clarification of the concept of assent is needed, the child's family context can provide us with a valuable guide to the way (...) we involve him in the decision-making process. (shrink)

Toxoplasma gondii is a highly successful parasite capable of infecting virtually all warm-blooded animals by actively invading nucleated host cells and forming a modified compartment where it replicates within the cytosol. The parasite-containing vacuole provides a safe haven, even in professional phagocytes such as macrophages, which normally destroy foreign microbes. In an effort to eliminate the parasite, the host up-regulates a family of immunity-related p47 GTPases (IRGs), which are recruited to the parasite-containing vacuole, resulting in membrane rupture and digestion of (...) the parasite. To avoid this fate, highly virulent strains of Toxoplasma coat the external surface of their vacuole with a secretory serine/threonine kinase, known as ROP18. At this host-pathogen interface, ROP18 phosphorylates and inactivates IRGs, thereby protecting the parasite from killing. These findings reveal a novel molecular mechanism by which the parasite disarms host innate immunity. (shrink)